# 首先创建一个列表，其中包含一些要打印的设计
unprinted_designs = ['iphone case', 'robot pendant', 'dodecahedron']
completed_models =[]

# 模拟打印每个设计，直到没有未打印的设计为止
# 打印每个设计后，都将其移到列表completed_models中
while unprinted_designs:
    current_design = unprinted_designs.pop()
    
    # 模拟根据设计制作3D打印模型的过程
    print("Printing model: " + current_design)
    completed_models.append(current_design)

# 显示打印好的所有模型
print("\nThe following models have been printed:")
for completed_model in completed_models:
    print(completed_model)
